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Updated on 2026-08-14

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Tangem 2018-05-28 14:43:40 +03:00
parent 1d2b869b46
commit 0374157cad
128 changed files with 22317 additions and 22317 deletions
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260
app/src/main/java/com/tangem/wallet/DerEncodingUtil.java
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@ -1,130 +1,130 @@
package com.tangem.wallet;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.DERSequenceGenerator;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;
/**
* Created by Ilia on 15.02.2018.
*/
public class DerEncodingUtil {
public static byte[] PackInteger(byte[] s)
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
baos.write((byte)0x02);
byte length = (byte)s.length;
if (s[0] > 0x7f) {
baos.write((byte)(length+1));
baos.write((byte) 0x00);
}
else {
baos.write((byte)length);
}
for(int i = 0; i < length; ++i)
baos.write(s[i]);
return baos.toByteArray();
}
public static byte[] packSignDer(BigInteger r, BigInteger s, byte[] pubKey) throws IOException
{
byte[] signDer = DerEncoding(r, s);
BitcoinOutputStream packKey = new BitcoinOutputStream();
packKey.write((byte)0x41);
packKey.write(pubKey);
byte[] keyArray = packKey.toByteArray();
BitcoinOutputStream result = new BitcoinOutputStream();
result.write((byte)(signDer.length+1));
result.write(signDer);
result.write((byte)0x1);
result.write(keyArray);
return result.toByteArray();
}
public static byte[] packSignDerBitcoinCash(BigInteger r, BigInteger s, byte[] pubKey) throws IOException
{
byte[] signDer = DerEncoding(r, s);
BitcoinOutputStream packKey = new BitcoinOutputStream();
packKey.write((byte)0x21); //compress key
packKey.write(pubKey);
byte[] keyArray = packKey.toByteArray();
BitcoinOutputStream result = new BitcoinOutputStream();
result.write((byte)(signDer.length+1));
result.write(signDer);
result.write((byte)0x41);
result.write(keyArray);
return result.toByteArray();
}
public static byte[] DerEncoding(BigInteger r, BigInteger s) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream(72);
DERSequenceGenerator seq = new DERSequenceGenerator(bos);
seq.addObject(new ASN1Integer(r));
seq.addObject(new ASN1Integer(s));
seq.close();
return bos.toByteArray();
}
public static byte[] DerEncoding(byte[] sign)
{
byte[] r = sign;
byte[] s = new byte[32];
for(int i =0; i < 32; ++i)
{
s[i] = sign[i+32];
}
byte[] newR = PackInteger(r);
byte[] newS = PackInteger(s);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
baos.write((byte)(newR.length+newS.length+2));
baos.write((byte)newR.length);
baos.write(newR, 0, newR.length);
baos.write((byte)newS.length);
baos.write(newS, 0, newS.length);
return baos.toByteArray();
}
public static byte[] DerEncodingBI(BigInteger[] sign)
{
byte[] r = sign[0].toByteArray();
byte[] s = sign[1].toByteArray();
byte[] newR = PackInteger(r);
byte[] newS = PackInteger(s);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
baos.write((byte)(newR.length+newS.length+2));
baos.write((byte)newR.length);
baos.write(newR, 0, newR.length);
baos.write((byte)newS.length);
baos.write(newS, 0, newS.length);
return baos.toByteArray();
}
}
package com.tangem.wallet;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.DERSequenceGenerator;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;
/**
* Created by Ilia on 15.02.2018.
*/
public class DerEncodingUtil {
public static byte[] PackInteger(byte[] s)
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
baos.write((byte)0x02);
byte length = (byte)s.length;
if (s[0] > 0x7f) {
baos.write((byte)(length+1));
baos.write((byte) 0x00);
}
else {
baos.write((byte)length);
}
for(int i = 0; i < length; ++i)
baos.write(s[i]);
return baos.toByteArray();
}
public static byte[] packSignDer(BigInteger r, BigInteger s, byte[] pubKey) throws IOException
{
byte[] signDer = DerEncoding(r, s);
BitcoinOutputStream packKey = new BitcoinOutputStream();
packKey.write((byte)0x41);
packKey.write(pubKey);
byte[] keyArray = packKey.toByteArray();
BitcoinOutputStream result = new BitcoinOutputStream();
result.write((byte)(signDer.length+1));
result.write(signDer);
result.write((byte)0x1);
result.write(keyArray);
return result.toByteArray();
}
public static byte[] packSignDerBitcoinCash(BigInteger r, BigInteger s, byte[] pubKey) throws IOException
{
byte[] signDer = DerEncoding(r, s);
BitcoinOutputStream packKey = new BitcoinOutputStream();
packKey.write((byte)0x21); //compress key
packKey.write(pubKey);
byte[] keyArray = packKey.toByteArray();
BitcoinOutputStream result = new BitcoinOutputStream();
result.write((byte)(signDer.length+1));
result.write(signDer);
result.write((byte)0x41);
result.write(keyArray);
return result.toByteArray();
}
public static byte[] DerEncoding(BigInteger r, BigInteger s) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream(72);
DERSequenceGenerator seq = new DERSequenceGenerator(bos);
seq.addObject(new ASN1Integer(r));
seq.addObject(new ASN1Integer(s));
seq.close();
return bos.toByteArray();
}
public static byte[] DerEncoding(byte[] sign)
{
byte[] r = sign;
byte[] s = new byte[32];
for(int i =0; i < 32; ++i)
{
s[i] = sign[i+32];
}
byte[] newR = PackInteger(r);
byte[] newS = PackInteger(s);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
baos.write((byte)(newR.length+newS.length+2));
baos.write((byte)newR.length);
baos.write(newR, 0, newR.length);
baos.write((byte)newS.length);
baos.write(newS, 0, newS.length);
return baos.toByteArray();
}
public static byte[] DerEncodingBI(BigInteger[] sign)
{
byte[] r = sign[0].toByteArray();
byte[] s = sign[1].toByteArray();
byte[] newR = PackInteger(r);
byte[] newS = PackInteger(s);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
baos.write((byte)(newR.length+newS.length+2));
baos.write((byte)newR.length);
baos.write(newR, 0, newR.length);
baos.write((byte)newS.length);
baos.write(newS, 0, newS.length);
return baos.toByteArray();
}
}